Yes you can and should be critical and yes it’s the only way to effect change. Involved and objectively critical. The “collaboration garbage” is light years better than the alternative but we’ve been spoiled for over a decade now so most of the workforce doesn’t know how terrible this Agency can be when left to their own devices.
This board is mostly complaints about not getting an ERR. A real problem. Blaming the union for that is naive. And most of those complaints would still exist under any other transfer process. There’s many more requests than available spots and many people requesting those spots. So many would go unselected regardless but all they see is the “me” side and think they’re getting screwed.
Others complain about being trapped red and that’s a real problem but it’s a hard problem to solve because the union works for all its members and there are other controllers in your building, that are less represented in the internet mob, that can’t afford to lose more staffing. The balance is very difficult but it’s not just about 1 person getting their way.